Hi found this question in a book and can seem to find any answers to it. So hpe u can help!Archimedes is suppose to have said "give me a lever long enough and a fulcrum on which to place it, and I shall move the world." Explain the physics behind Archimedes thinking.

is "r" suppose to mean the distance?torque is directy proportional to the distance and force. so if r is getting larger, this means that the force will also increase. How does this relate to the question? :?: lolthanks

I have a question. I had an experiment using a meter stick, pencil (round without flat sides), quarter(new state one) and penny (1981 or later one). I had to balance the meter stick on the pencil to find the center of gravity. It was 45.5. I then placed the quarter on 32 cm. To balance the quarter, I had to place the penny on 81 cm. So c.g.= 45.5cm x= 81cmEquation reads as follows:L1=c.g.-32=___-32, L1=___cmscalculate L2= m1/m2 (L1)=____ ( ); L2=____cmsexperimental L2= x-c.g. when stick is balancedL2=_____-______; L2= _____ cms (experimental)Percentage error= larger-smaller/calculated value x 100Percentage error= ( )-( )/( ) x 100Percentage error=_________%

I put 13.5 on the first blank and -18.5 on the second. On the m1/m2 blank, I put 32/81 (-18.5) ; L2= -7.31 On the experimental L2= 81-45.5=35.5. Please let me know if I am doing this correctly. I don't know even where to begin with the percentage error. Can you please help???

You should have put 45.5 on the first black , which will give you L1=13.5 on the second. And you can work out the rest.For Percentage error: find the (larger and smaller value) from the (calculated L2 and experimental L2).